Sash-operator for greenhouses



(No Model.)

J. A. EYANS 8: L. A. TEAGLE,

S'ASHOPERATOB FOR GRI'IEVENHOU'SIESJ No. 371,132. Patented Oct. 4, 1887.

70 2 522056%, 152 we 27202; I

UN TED STATES JOHN A. EVANS AND LEANDER A.

PATENT OFFICE.

TEAGLE, on RICHMOND, INDIANA.

SASH-OPERATOR' FOR GREENHOUSES.

EPECIFICA'IION forming part of Letters Patent No. 371,132, dated October 4, 1887.

(No model.)

To all 1071,0112 it may concern.-

Be it known that we, JOHN A. EVANS and LEANDER A. TEAGLE, citizens of the United States, residing at Richmond, in the county of Wayne and State of Indiana, have invented certain new and useful Improvementsin Greenhouse-Ventilating Apparatus; and we do doclare the following to be a full, clear, and ex act description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon,which form a part of this specification.

Our invention relates to that class of devices operating to open and close the windows of greenhouses simultaneously to any desired extent.

Our invention consists in the combination of mechanical devices hereinafter described, by which the sash of a greenhouse may be raised, held in position, and lowered at a single operation.

In the drawings, Figure l is a perspective view of the interior of a greenhouse showing ourimproved apparatus in position. Fig. 4 is a side elevation of an alternative combination of gearing for operating the opening and closing devices. Fig. 5 is a perspective detached view of the face-plate and journal-bearings which support the gearing in Fig. 4 and the manner of attachment to the upright post.

In Fig. 1, It represents an upright post, which is part of the framing of the greenhouse. The line-shaft G has its end bearing in suitable boxing attached to the upper portion of the upright post 71, in which it is permitted to revolve. The lineshaft is furnished with sleeve-arms H, which are secured to it by setscrews in any required position. To the outer end of the sleeve-rod isjointed a brace-rod, i, which is hinged at the, opposite end to the lower bar of the hinged sash K. As the handwheel A is turned, mot-ion is transmitted to the line-shaft, which in its revolution carries the sleeve-rod H in the arc of a circle at its outer end, and this actuates the brace-rod I to raise or depress the sash on its hinges.

In Fig. 4: a base-plate, a, having projecting flanges a, is bolted to the upright post 71. The

bolts which secure the plate a to the post h pass through elongated holes z i in said plate, by which the plate is made adjustable vertically. The plate a has projecting lugs o c and e e, which are provided with openings to receive journals so arranged as that said journals shall be at right angles to each other, the lugs e e projecting outwardly from the front face of the plate, and the lugs c c projecting out from the side, the lug a being curved to this effect, all as shown in Fig. 5.

In Fig. 4, A is a hand-wheel mounted on a horizontal shaft, 8, said shaft having its journal-bearings in the lugs c o of the base-plate a. The shaft 8" is provided with a worm-gear, s, which engages a cog-wheel, d, mounted on the end 'of a horizontal shaft, e,which has its journal-bearings in the lugs e e of the plate a, and

being at right angles with the shaft 8. On the opposite end of the shaft e and outside of the bearing is fixed a sprocket-wheel, D, like that shown in Fig. 1, to operate an open link chain, E, as seen in Fig. 1. This arrangement of the worm-gear s on the shaft of the hand-wheel A enables the operator to raise a long line of sash with a small amount of power exerted, and at the same time constitutes a perfeet lock on the intervening gearing, so that no sudden storm or gust of wind can move the sash with which it is connected, such lock being, by the construction and combination of the parts, automatic and self-existing.

The operation of our improved combination of devices is "as follows: When the hand-wheel is put in motion by the operator, the sprocketwheel D is revolved,and by means of the openlink chain the larger sprocket-wheel, F, is put in motion, thereby turning the line-shaft G, which is rigidly attached to it, moving the outer end of the sleeve-arm H, carrying the brace-rod I toward the sash, and thus raising the lower bar of the sash K on the hinges of the sash as far as desired, when, by means of the combination shown in Fig. 4, it is held in position at any point automatically.

\Ve are aware that a line-shaft carrying arms and connectingrods to move the sash have been used, and these we do not broadly claim; also, that said line-shaft has been operated by means of gearing mounted on vertical shafts and operated from'the ground, and this we do stantially in the manner and for the purpose 10 not broadly claim; but herein set forth.

What we do claim as onrinvention, and de- I In testimony whereof we affix our signatures sire to secure by Letters Patent, is in presence of two witnesses.

5 In a greenhonsevent-ilating apparatus, the JOHN A. EVANS.

combination of the plate a, provided with the LEANDER A. TEAGLE. journal-bearing lugs e e c c, the shafts, and Worm s, shaft e, wheels d and D on said shaft,

' with chain E, wheel F, and line-shaft G, sub- \Vitnesses:

W. T. DENNIS, W. A. PEELLE. 

